Abstract: A flapper check valve employed to prevent flow up the work string while allowing flow down the work string and into the well is disclosed. The check valve is activated by a compression spring, which then acts on a ball which will further act on a cam profile attached to the back of a flapper. The apparatus causes the flapper to default to the closed position when the flow is stopped, regardless of the position of the valve, even when gravity is acting against the flapper. The compression spring also allows for an apparatus which possesses lower operating stresses on the spring.

Abstract: A variable sized coiled tubing counter is described herein. The variable sized coiled tubing counter includes a plurality of rollers. At least one roller is a floating roller which is allowed to travel and may be connected to a tension assembly. The variable sized tubing counter typically includes a counter which is rotationally connected to a floating counting roller using a somewhat flexible axle. As coiled tubing passes through the tubing counter, the length of tubing is determined based on the number of rotations of the counting roller. The use of floating, tensioned rollers allows the disclosed tubing counter to be utilized with multiple diameters of coiled tubing without significant adjustment to the tubing counter or changing components of the tubing counter.

Abstract: A bit jet enhancement tool is provided, the tool comprises two or more separate flow paths, each of the flow paths has multiple hollow chambers connected in series; each of the hollow chambers comprises a first constricted chamber with a fluid entry, a first expansion chamber located adjacent to the lower end of the first constricted chamber, a second constricted chamber with the upper end of connected to the lower end of the first expansion chamber; a separate second expansion chamber connected to the lower end of a plurality of the second constricted chambers; a single port located adjacent to the lower end of the second expansion chamber.

Abstract: The Mill-Right system is a hydraulic control system that optimizes drilling performance by controlling speed and force at the drill bit. It controls 3 drilling parameters through integrated software. 1) Weight on Bit (WOB); 2) Rate of Penetration (ROP); and 3) Differential Pressure (DP).

Abstract: A coiled tubing injector apparatus for inserting and/or removing coiled tubing from a well head comprising a first injector column and a second injector column forming a central pathway within a frame. The first and second injector columns each comprise an inner and outer band, the outer band containing a plurality of rolling elements for engaging the coiled tubing and the inner band creating drive force to energize the outer band. The inner band further comprises a wear plate designed to sustain the majority of wear for less costly maintenance and repair of injection heads.

Abstract: A system is provided for injecting coiled tubing (CT) into and out of a wellbore. In embodiments, separate injector and reel units are provided releasing constraints on CT size and length. The injector unit is fit with an extendible mast for handling larger bottom hole assemblies and fit with a rotating gooseneck for accepting CT from alternate arrangements of the reel unit. The mast is reinforced to resist CT loading. The capacity of the reel is maximized for the reel unit transport envelope. The reel is rotated using an offset drive engaging a bounding reel flange, such as engaging drive and bull gears. A generally radial displacement of the drive from the reel permits replacement of the entire reel.

Abstract: A control system for moving a bottom hole assembly at an end of a coiled tubing string in a wellbore includes a controller configured to move the bottom hole assembly at an initial rate, unless the controller determines that moving the bottom hole assembly at the initial rate causes a predetermined threshold parameter to be reached, whereupon the controller is configured to default to moving the bottom hole assembly at a safe rate.

Abstract: An extended reach tool includes two or more separate flow paths, wherein each of the flow paths has multiple hollow chambers connected in series. Each of the hollow chambers includes a first constricted chamber with a fluid entry, a first expansion chamber located adjacent to the lower end of the first constricted chamber, and a second constricted chamber with the upper end of connected to the lower end of the first expansion chamber. A separate second expansion chamber is connected to the lower end of a plurality of the second constricted chambers. A single port is located adjacent to the lower end of the second expansion chamber.

Abstract: A clutch mechanism includes a meshing arrangement between a first plurality of teeth on a first component coupled to a driven shaft and a corresponding second plurality of teeth on a second component coupled to a driving shaft.

Abstract: An oilfield assembly including a pump in fluid communication with a string of coiled tubing on a tubing reel through a coiled tubing swivel assembly, includes a fluid inlet segment coupled to a swivel body having a central axis, and a rotatable hollow shaft having a portion that extends axially within the swivel body, wherein the fluid inlet segment, swivel body and hollow rotatable shaft form a conduit for passage of a pumped substance to the tubing reel from the pump. The rotatable shaft includes a first end attachable to the tubing reel, and a distal second end, at least part of which is configured to engage a corresponding indentation in the body, thereby preventing direct contact between the distal end of the shaft and the pumped substance.

Abstract: A coiled tubing injector head unit includes a first bearing carrier and a second bearing carrier attached to a frame of the injector head unit that support an input drive shaft extending between the first and second bearing carriers, a sprocket shaft coupled to the input drive shaft that supports a pair of continuous parallel drive chains that revolve in a common plane and have opposed, elongated parallel runs spaced apart to form a path for engaging tubing passing there through, and a hydraulic motor attached to the frame opposite the first bearing carrier, and a gearbox attached to the frame opposite the second bearing carrier, wherein the input drive shaft is operatively connected to and extends between, but is not supported by, the hydraulic motor and the gearbox.

Abstract: A multi-axle transport trailer having a plurality of axles includes a suspension comprising air bags associated with each axle, the air bags in communication with an air source, wherein air bags associated with different axles are capable of having different air pressures therein. The trailer further optionally includes a steering system associated with at least one axle, the axle including a tie rod connected between wheels on both ends of the axle, the steering system comprising cylinders configured to articulate the wheels, and a sensing device configured to monitor movement of the tie rod and facilitate actuating the cylinders to turn the wheels.

Abstract: A combination of a carrier block and gripper block is disclosed. The gripper block includes a first side and a second side spaced apart from the first side, and an upper surface spanning the distance between the first side and the second side. The upper surface includes a gripping surface. The gripper block includes at least one recess positioned in at least one of the first side and the second side of the gripper block, the at least one recess including an engagement surface. A retention device includes a retention feature proximate the first end and extending laterally away from a longitudinal axis of the retention device. The carrier block includes at least one retention recess disposed at least partially through the carrier block, the at least one retention recess being configured to receive a second end of the retention device.

Abstract: A coiled tubing injector apparatus for inserting and/or removing coiled tubing from a well head comprising a first injector column and a second injector column forming a central pathway within a frame. The first and second injector columns each comprise an inner and outer band, the outer band containing a plurality of rolling elements for engaging the coiled tubing and the inner band creating drive force to energize the outer band. The inner band further comprises a wear plate designed to sustain the majority of wear for less costly maintenance and repair of injection heads.

Abstract: The Mill-Right system is a hydraulic control system that optimizes drilling performance by controlling speed and force at the drill bit. It controls 3 drilling parameters through integrated software. 1) Weight on Bit (WOB); 2) Rate of Penetration (ROP); and 3) Differential Pressure (DP).

Abstract: A method of controlling rates of moving a coiled tubing string in a wellbore includes providing an injector head control system for moving a bottom hole assembly at an end of the coiled tubing string in the wellbore, that maintains operating settings of the injector head if the control system determines that the bottom hole assembly is moving in the wellbore within a range of rates, and varies operating settings of the injector head if the control system determines that the bottom hole assembly is moving in the wellbore outside the range of rates, to thereby revert to moving the bottom hole assembly in the wellbore within the range of rates. The control system determines whether the bottom hole assembly is moving within or outside the range of rates based on one or more sources of feedback from both the bottom hole assembly and the injector head.

Abstract: A bit jet enhancement tool is provided, the system comprises two or more separate flow paths, each of the flow paths has multiple hollow chambers connected in series; each of the hollow chambers comprises a first constricted chamber with a fluid entry, a first expansion chamber located adjacent to the lower end of the first constricted chamber, a second constricted chamber with the upper end of connected to the lower end of the first expansion chamber; a separate second expansion chamber connected to the lower end of a plurality of the second constricted chambers; a single port located adjacent to the lower end of the second expansion chamber. The tool provides an effective fluid oscillator which is reliable, long-lived and economical.

Abstract: An extended reach tool is provided, the tool comprises two or more separate flow paths, each of the flow paths has multiple hollow chambers connected in series; each of the hollow chambers comprises a first constricted chamber with a fluid entry, a first expansion chamber located adjacent to the lower end of the first constricted chamber, a second constricted chamber with the upper end of connected to the lower end of the first expansion chamber; a separate second expansion chamber connected to the lower end of a plurality of the second constricted chambers; a single port located adjacent to the lower end of the second expansion chamber. The tool provides an effective fluid oscillator which is reliable, long-lived and economical.

Abstract: A propulsion generator which employs one or more unbalanced rotors, such as fly wheels or other unbalance rotating members, which can be connected at a lower portion of a downhole coiled tubing string or other downhole tubular string for inducing propulsion of the coiled tubing. The unbalanced rotors may be oriented at different positions with respect to each other. The instantaneous fluid flow through the propulsion generator is substantially equivalent to the average fluid flow rate through the tool to provide relatively consistent fluid flow to downhole motors below the propulsion generator for operating the drill bit and/or cutters.

Abstract: A mixing tank disposed onboard a unit for coiled tubing oilfield operations includes a mixing paddle within the mixing tank capable of agitating liquids therein, a water inlet capable of introducing water into the mixing tank and directing water flow toward the mixing paddle, and one or more chemical inlets capable of introducing one or more chemicals from chemical storage units into the mixing tank.